Plants trees up to 25 m tall or more; monoecious; branches more or less drooping. Internodes of deciduous branchlets with 6-8 pubescent furrows. Scale leaves pale green, in whorls of (6-)7-8, those on the deciduous branchlets free for (0.4-)0.5-0.7 mm. Male inflorescences 10-40 mm long,, up to 2 mm thick, with appressed bracts. Females inflorescences 3-5 mm long. Infrutescences shortly cylindric to subglobose, 8-20(-25) m long, 11-16 mm wide, the valves pubescent and with 2 longitudinal ridges. Fruits pale yellowish-brown, about 5-7 mm long.
Casuarina equisetifolia is cultivated, usually in sandy places at 5-50 m elevation. The Flora of Somalia reports it as growing in regions S2-3. It is native to Australia and probably also southeast Asia and islands of the Pacific but it is widely planted in the tropics and often becomes naturalized. It is good for hedging, windbreaks, and for stabilizing coastal sand. It is also a good source of fire wood.
Thulin notes it may be present along the coast near Berbera.
There is a species of Casuarina growing at the Maansoor in Hargeisa. At this point, it has been identified as Casuarina equisetfolia but it is possible it is another species.
